Directions

Trivia

Whereas Rust's final, bloodiest form seems to only slightly resemble a red demon, Demon Sabitsuki outright looks like a red demon, due to the horns. Also, she is less bloody, only bleeding from the forehead and perhaps the mouth.

Theories

It is possible that she represents Sabitsuki's weakened core.

Her noticeable resemblance to a red demon suggests she has been corrupted due to Rust's control over Sabitsuki.